Combined typewriting and comput



p 1937- A. G. F. KUROWSKI 2,076,152

COMBINED TYPEWRI'IING AND COMPUTING MACHINE Filed April 11, 1932 3 Sheets-Sheet l Anon \4 April 1937- A. G. F. KUROWSKI 2,076,152

COMBINED TYPEWRITING AND COMPUTING MACHINE Filed April 11, 1932 3 Sheets-Sheet 2 April 6, 1937. A. G. F. KuRowsKl COMBINED TY PEWRIT ING AND COMPUTING MACHINE Filed April 11, 1952 3 Sheets-Sheet 3 luyamon:

I Afton Y.

Patented Apr. 6, 1937 COMBINED TYPEWRITING AND COMPUT- ING MACHINE Alfred G. F. Kurowski, Brooklyn, N. Y., assignor, by mesne assignments, to Underwood Elliott Fisher Company, New York, N. Y., a corporation of Delaware Application April 11, 1932, Serial No. 604,514

25 Claims.

This invention relates to typewriting machines (such as the Underwood) combined with ten-key adding machines, such as the Sundstrand, and the general object is to produce an improved,

simplified combined typewriting and adding machine of thisclass.

The present application discloses certain improvements over my pending application Serial No. 449,430, filed May 3, 1930.

The Sundstrand machine has been mounted directly along the side of the Underwood machine to print on the same work-sheet carried by a single platen mounted upon the carriage, having a lengthened range of travel to permit the work-.

l5sheet to be operated upon either by the typewriter-types or by the adding-machine types. The typewriter printing-point in such combined machine has been a great distance from the printing-point of the adding-machine types, and one of the objects of the present improvements is to mount the adding-machine types closer to the printing-point of the typewriter. The addingmachine types are mounted upon bars, which are shiftable upwardly to bring different types into use, these bars being arrangedin a group, so

as to type an entire number at one stroke.

A feature of the present invention is to mount these bars within the typewriting-machine frame, where they occupy space that has heretofore been occupied by the right-hand ribbon-spool of the Underwood machine. The bars may be extended up between the key-levers of the typewriter and at their lower ends may be connected to the Sundstrand mechanism. The bars are lengthened to enable them to be mounted in this manner.

' Both ribbon-spools are placed at theleft-hand side of the typewriting machine and arranged side by side, a loop of the ribbon being carried from one spool past the typewriter printing-point and 0 also past the adding type printing-point and around the adding type-bars, and back to the other spool mounted at the left-hand side of the machine. The ribbon is threaded through the usual vibrator of the typewriter and is carried up and down thereby; and thence, from the vibrator, across the adding types.

This arrangement brings the adding types sufficiently close to the printing-point of the typewriter as to render the machine useful for many kinds of work without making it necessary to tabulate the carriage back and forth between points on the same line of typing and printing, as has been the case where the Underwood and Sundstrand machines have been set side by "side..

Provision is made, however, for tabulating the In the Sundstrand machine the keyboard is directly in front of the system of number-types, but, according to the present improvements, the keyboard may be placed at one side of the number-types, either to the right or to the left, as desired, and it is illustrated as placed at the left of the adding type-system, and preferably in the front of the typewriter-keyboard at about the middle thereof.

The bulk of the Sundstrand mechanism is enclosed in a casing of ordinary height, but this casing is broadened to equal or exceed the width of the typewriting machine, and the latter surmounts said Sundstrand casing. The Sundstrand mechanism which operates the type-bars is placed directly under said bars in the same manner as the standard Sundstrand machine. The keys are connected, preferably by oblique levers to the keyboard, either at the right or, the left, preferably at the left. Said casing affords suit able space beneath the typewriter, at the left of the Sundstrand mechanism, so that, if desired, an electric motor may be placed in this space for cycling the Sundstrand machine by power instead of placing the same underneath the Sundstrand machine, as heretofore.

The drawings, however, show the usual handle for cycling the adding and printing mechanism. This arrangement produces an effective and unitary design for the combined machine.

The typewriter-platen is located considerably above the position which is occupied by the platen of the Sundstrand machine, but the Sundstrand platen is omitted, and a single paper-carriage acts for both mechanisms, and the adding type-bars are lengthened upwardly considerably, so-as to bring the types to positions to print on the front of the platen". The lengthening of the adding type-bars makes it practicable to mount the adding mechanism under the typewriting machine, and operate the. adding types upon the platen which is at the top of the typewriter.

The mechanism of the Sundstrand machine which operates the adding types is modified, this being a necessity, because of the increased height of the adding type-bars. The hammers are made to actuate plungers which force the adding types against the platen, said hammers being operated by a novel system of levers.

The side walls of the typewriter-frame may be modified, or provided with extensions in order to accommodate the ribbon-mechanism at one side of the machine, and the adding type-bars at the other side of the machine.

Two tabulator-raclrs are shown, one being the regular type, as is usually used for tabulation towards the left, and the other being stationary with inserted stops to cooperate with a fingeroperated stop carried by the carriage for tabulation towards the right, this being used when the operator moves the carriage towards the right by the usual handle.

Other features and advantages will hereinafter appear in the accompanying drawings,

Figure 1 is a side elevation of the Underwood typewriter superposed on the Sundstrand adding machine, showing the arrangement of the parts that co-operate for printing upon the typewriter-platen.

Figure 2 is a side elevation, showing the lengthen d Sundstrand type-bar and the means for operating it by the regular Sundstrand printing hammers.

Figure 3 is a perspective view, bringing out details the connections from the adding ireyboard at the front of the typewriter to the regular hey-stems of the Sundstrand mechanism.

figure is view showing, in perspective, the arrangement o the elongated Sundstrand typobars how they may be nested within the typewriter-frame; Figure also bringing out dethe aux liary tabulating means, and also showing how the typing ribbon is guided past the type-bars.

Fi ure 5 is a view showing how supports for the upper ends the Suridstrand type-bars and associated mechanism may be secured to the lZZI ZltEFfI-; am'e.

:wood key-levers, and shows how the Sundl" pe-bar mechanism may be interspaced with said hey-devers,

Figure l is a top plan, showing the novel organization of Underwood typewriter and Sundstrand mechanism; said view also bringing out the disposal of the two ribbon-spools at the left of the typewriter, and how a loop may be formed in the ribbon to carry past both the typewriting and adding printing points.

Figure 8 is a diagrammatic view, indicating how the regular Underwood ribbon feeding and reversing mechanisms may be operated from the left side of the machine. I

Figure 9 is a detail view of a ribbon-guide.

The Sundstrand adding machine i0 is mounted on a bed i l, which is of larger extent than the regular Sundstrand bed in order to support a casing l2 which will afiord a sufficiently large base for the Underwood typewriter, which, as shown in Figure l, rests upon said casing, the Underwood typewriter being thus superposed bodily above the Sundstrand adding mechanism. Vt'thin said casing l2 the Sundstrand mechanisrn is disposed just far enough to the right of the typewriter so that the group of Sundstrand printing bars or rods it will just clear the right side of the system of Underwood type-bars i l, disposed in the usual arcuate array.

Underwood key-levers it have the usual lseys El and actuate the Underwood type-bars id through the usual bell-cranks it to print against a typewriter-platen is, mounted on a platenaxle 20 journaled in a case-shifting frame 2! carried by the letter-feeding carriage 22, which is guided on a front track 23 and a rear track 24.

For bringing the group of Sundstrand printing bars 13 closely to the nest of Underwood type-bars i6, it is contrived to interspace said printing bars 13 between some of the key-levers 16 at the right of the key-lever group, as indicated in Figure 6. The key-levers l6 may have variously ofiset portions I6, Figure 6, bent, as shown, to clear differently spaced printing oars l3.

An important advantage results from spacing the Sundstrand printing bars 13 thus closely to the typewriter printing-point, said advantage residing in the shortened lengths or the carriageplaten is and guide-tracks 23, 24, as compared with the lengths of the platen and tracks necessary, whereas heretofore the Sundstrand mechanism was disposed entirely beyond the side of the typewriter-frame. A reduction of said lengths amounting to at least six inches is thus afforded bythe new improvements.

The typewriter-carriage advances under the pull of the usual spring-motor, not shown, in letter-feeding steps controlled by the well-known Underwood escapement-mechanism 25, gener ally indicated in Figure l. The usual Underwood column-tabulating mechanism 26 of the type described in the patent to L. A. Wernery,

No. 1,182,437, dated May 9, 1916, is employed, and is generally indicated in Figure 1.

By reducing the distance between the typewriter printing-point and the adding machine printing-zone to the small compass indicated in Figure 7, another advantage results as will be evident from said Figure '7, from which it will be seen that where the printing or an item by the adding machine type-bars i3 is to follow line of writing eliected by the typewriter-mechanism, the former printing operation may in many cases take place without any preparatory positioning of the typewriter-carriage, inasmuch as in such cases the resulting relatively small space between the tmoewritten portion of the line and the adding machine printed item would not be objectionable. Should it be desirable, however, to reduce this space between the typewritten portion of a lin and the portion printed by the adding machine the carriage may, alter the I typewritten portion of the line is finished, be shifted toward the right, such shifting being facilitated according to the present improvements by the provision of an auxiliary tabulating rack 28, which may be stationarily mounted behind the paper-carriage upon brackets 29 extending upwardly from posts 38 of the typewriter-frame that support the rear typewriter-carriage track 23. As indicated in Figure '7. said traclr 24 may be secured to said posts 30 by means of the usual tongues 3i which extend rearwardl from the track 24 to rest upon and be secured by screws 32. As shown in Figure 7, the auxiliary rack supporting brackets would rest on said tongues 35, and would also be secured by said screws 32.

As shown in Figure l, the tongues 3i may alternatively be formed to include the brackets 29, that is, the upward extension of said brackets. In either case the auxiliary rack 28 is fastened to said brackets Ml by screws 33. The auxiliary rack 28! may have letter-spaced slots to receive one or more stops 34, which may be selectively set in different positions along the slotted rack 28 to co-operate with a stop 35 carried by the carriage and normally retracted, so that in ordi- "65 and associate ribbon nary carriage-travel, it clears a forwardly-projecting tongue 36 of the stop 34.

For projecting the carriage carried stop 35 rearwardly, so that it may engage the projection 36, and for conveniently effecting such projection by a finger of the right hand while the typewriter-carriage is being grasped by the right hand to position it toward the right, said stop 35 may be at one end of a swingable bail 31 extending from a point somewhat to the left of the center of the typewriter-carriage to a point slightly beyond the right end of said carriage for connection with a finger-piece 38 disposed close to the usual finger-piece 39, which is at the right end of the Underwood typewriter-carriage.

The finger-piece 38 is formed on the end of a forwardly-extending arm 40 of a bell-crank M,

which is pivoted to the right end of the carriage-frame by a pivot-stud 42. Said bell-crank 4i is for swinging the ball 31, which has at the right end an upwardly-extending arm 43, and the bell-crank M has a downwardly-extending arm 44, the two arms 43, 44 being connected by a link 45 through pivotal connections 46, 41.

As best seen in Figures 1 and 4, the stop 35 is formed by an upwardly and rearwardly extending arm at the left end of the bail 31 which may rock freely upon the usual Underwood caseshifting rock-shaft 49, which, as best Seen in Figure 4, may be extended toward the right to afford a journal for the right end of said bail.

In shifting the paper-carriage toward the right for registering certain work-sheet zones with the Sundstrand type-bars I3, the operator may engage the carriage-finger-piece 38 with the thumb of his right hand, and, at the same time, with another finger of said hand may depress the fingerpiece 38. Such depression of the finger-piece 38 will, through the described connections, project 4 the stop 35 rearwardly, to co-operate with the projection 36 of the fixed stop 34 in gaging the position of the carriage relatively to the Sundstrand type-bars I3. The stop 35 may be buttressed by a bracket 50, which may be secured to 5 the rear cross-member SI of the carriage-frame by screws 52. Said bracket has an upwardly and rearwardiy extending portion 53 slotted, as indicated, so that said portion may embrace the stop 35, and thus support said stop 35 against 50 undue lateral strain.

In order that the Sundstrand type-bars I3 may be disposed closely to the typewriter print ing-point, as herein shown, it is contrived to shift the regular right-hand Underwood ribbonspool 54 and its shaft 55 toward the left of the typewriter printing-point, so as to make room for said Sundstrand type-bars I3. A regular typewriter-ribbon 13 may be employed and the ribbon-spool 54 and its shaft 55, together with the associate ribbon reversing and feeding mechanism that were formerly in their usual position at the right of the typewriter, are now disposed to the left of the usual left ribbonspool 56 and shaft 51, said left spool, left shaft mechanism remaining in their usual location. Figure 8 shows the arrangement of ribbon feeding and reversing mechanism which may include the usual Underwood parts (not shown) for re- 7 versing the ribbon automatically and described in the patent to W. F. Helmond, No. 931,303, dated August 17, 1909. Figure 8 indicates'how the Underwood ribbon-feeding ratchet-wheel and pawl 58 may be placed on the usual Underwood 7 ribbon-feeding shaft 59, said shaft not extending reversing and feeding to the right side of the machine as heretofore, but being shortened and journaled in brackets 68, 6I, which support the ribbon feeding and reversing mechanism, which, it may be noted, includes the automatically-operated ribbon-reversing arm 62, through which the ribbon is threaded. Thebracket 6I- may be attached to the typewriter-framework in the usual manner,

by screws 63. The transposed bracket 60 that was formerly at the right side of the typewriter may be modified for attachment to a wall 64 of the typewriter-framework, said bracket 69 being secured to said wall, by screws 65, Figure 8. The ribbon-feedingshaft 59, when rotated in the direction indicated by the arrow, Figure 8, may rotate either the left ribbon-spool shaft 55 or the right ribbon-spool shaft 51, through pinions 66 or, 61 respectively, depending on the endwise position of said shaft 59. For meshing with said pinions 66 and 61, the shafts 55, 51 are provided, at their lower ends, with pinions 68. As seen in Figure 8, rotation of the shaft 59, in the direction of the arrow, will rotate the shaft 55 in such direction that the spool 54 connected to said shaft 51 takes up the ribbon, the pinion 68 of shaft 55 being in mesh with the pinion 66. When the directionof rotation of the shafts 55, 51 is to be reversed, the'shaft 59 is shifted endwise toward the left, thereby disengaging the pinion 66 from the pinion 68 of the shaft 55 and concomitantly bringing the 'pinion 61 into engagement with the pinion 68 of the shaft 51. In this case the spool 56 is driven to take up the ribbon. I

To afford room for the transposed ribbon-spool 54 and associated parts, which are now at the left side of the typewriter, the left side member of the typewriter-framework may be formed to include a channel-portion 69, which may be symmetrical generally with a similar channel-portion 10 formed in the right sidemember I23 of the typewriter-framework, the channel-portion 10 affording room for the Sundstrand print-bars I3 and associated parts. The channel-portion 69 at the left of the typewriter-framework includes the wall 64, to which the ribbon-spool bracket 60 is attached, as aforesaid, said wall terminating at its lower portion to form an opening H for clearance of the parts, as indicated in Figure 8.

The ribbon 13 performs its usual function for the typewriter-mechanism; with both ribbon spools at .the left, as shown, and by means to be described, it is contrived to make said ribbon serve also the Sundstrand print-bars I3. To 00-- operate with the typewriter-types 12, the ribbon 13, coming from what is now the right-hand spool 56, may be threaded through the usual Underwood ribbon-vibrator 8|, which, through parts not shown herein, but described in Patent No. 926,050, to F. A. Cook, dated June 22, 1909, normally' keeps the ribbon withdrawn from the printing-point and only elevates said ribbon to the printing-point when a typewriter-type 12 strikes the platen I9. The ribbon does not extend straight from the ribbon-spool 56 to the ribbon-vibrator 8i, but it is first turned around the usual guide 62 for direction through the adjacent arm 62, and thence to said vibrator 8|, said guide and arm being arranged as usual with respect to the spool 56, which, it will be remembered, has not been transposed. Said ribbon 13 is extended from the ribbon-vibrator M to the right, to cross and pass beyond the held of the Sundstrand print-bars l3. After passing said field, the ribbon is returned to what is now the 7 print-bars.

left-hand ribbon-spool 54, and, to this end, it is looped by passing around guides I4, I5 and I6. The guides I4, 15 project upwardlyfrom and are secured to the right side member of the typewriter-framework, as indicated in Figures 4 and '7, the guide I4 keeping the ribbon parallel with the platen and so that it may pass in the space between the Sundstrand types TI and said platen. The guide I5 is spaced from the guide I4, so that the ribbon is guided around the front of the Sundstrand type-bar mechanism toward the guide l6. Said latter guide I6 projects upwardly from a plate 78, Figure '7, secured to the left member of the typewriter-framework by screws 19. From the guide It, the ribbon, for direction through an arm 62 associated with the ribbonspool 56, passes around another guide 80, and thence back to said ribbon-spool 54, as shown in .Figure '7. Said guide 80 projects upwardly from the left side member of the typewriter-framework.

In the Sundstrand type-mechanism herein shown, the print-bars i3 are normally lowered, so that the zero-types are about one space below the printing-line. The ribbon it, usually a bicolor ribbon, may have its regular dark field normally'covering the printing-line at the Sundstrand type-field. The ribbon may also be shifted upwardly during a printing operation to bring its other printing-field to the printing-line in said type-field. To this end, the ribbon l3 is threaded through the usual Sundstrand ribbon-vibrator formed by a pair of vertically-movable slides 8 one at each side of the system of Sundstrand Each time the Sundstrand printbars are operated to print through the lower ribbon-field, the slides 84 are shifted upwardly to bring said lower held to the printing-line and then are retracted. The slides ti l may be operated in the manner disclosed in reissued Patent No. 14,237, to G. D. Sundstrand,'dated December 26, 1916. To this end, said slides extend downwardly to be actuated by the levers 202 which have the same reference numerals in said patent as herein given.

The Sundstrand adding mechanism, as described in the aforesaid reissued Patent No. 14,237, includes a keyboard of the ten-key type. According to the present improvements, the keys or tops of the key-stems 90 of the Sundstrand keyboard, generally indicated as 9!, are removed, so that connections may be made between said key-stems 90 and a keyboard 92, located immediately in front of the typewriter-keyboard, and centrally thereof, as best shown in Figures 1 and 7. For each key or control 90 of the Sundstrand keyboard 9i, there may be a corresponding key or control in the new keyboard 92. The Sundstrand keyboard 9i includes a central column of four keys and two columns on each side of said central column, each of the side columns having three keys. Two of the key-columns, one on the extreme left and one on the extreme right of the keyboard, are for various control keys, such as repeat, clear, error, ci.c.. six keys being thus apportioned as control keys. The ten keys in the three middle columns are the ten digitkeys from to 9, the lower key in thecentral column being the "0" key. The thirteen keys just enumerated as constituting the Sundstrand keyboard 9I are duplicated in the new keyboard 92. which includes a plurality of keys 95, one-for each of the Sundstrand keys. Said keys are either directly mounted upon key-stems 96 or, as in the case of a repeat key, for example, the key is mounted upon a latchable stem 91, which, as shown in Figure 1, may be pivoted at 98 to the key 99, which constitutes the repeat key of the new keyboard 92. All the key-stems 96 and 99 are guided, for up-and-down movement, in a perforated plate I00, which forms part of the casing I2, said casing having an opening IOI to form a frame for said plate I00, which is secured to the margin of said frame by screws I02, Figure 7. Each key-stem 96 or 99 of the new keyboard 92 is connected to a corresponding stem 90 or 90 of the Sundstrand keyboard, and, to this end, each key-stem 96 or 99 has formed integrally therewith a lateral branch I03, which extends toward the right, rearwardly and downwardly to terminate in a vertically extended portion I04, the lower end of which may be fastened to a Sundstrand key-stem 90 or 90, as at I05.

The Sundstrand key-stem 99 is the Sundstrand repeat key which operates when depressed and looked, as shown in the'aforesaid Reissue Patent No. 14,237, to look a restoring member M6 of the Sundstrand mechanism in inoperative position, it being understood that said member i06 when so locked prevents restoration of the Sundstrand digit-indexing elements, and so provides for repetition of registering an item without operating the keys. To hold the Sundstrand key iii) in its depressed position, said key Stil is not itself looked as heretofore, but, instead, the corresponding key-stem 99 of the new keyboard 92 is provided with the aforesaid latchable stem ii'i, which has a notch id'l. Said notch i l, when the latchable key 91 is depressed, may be caught by the under side of the plate itii by pushing said hey rearwardly, and is held in engagement with said plate by a spring Hi9 attached at one end to an arm iilil of the latchable member d'i, the other end ofsaid spring I98 being attached to a fixed stud Mil. Conversely, the key ill may be releasedby pushing it forwardly.

Of the six control keys of the Sundstrand keyboard, there has been described only the extension of one of said control keys to the new keyboard 92, namely, the repeat key, it being evi dent that where a control key must be held down, as just described for the repeat key, the connections from the Sundstrand keyboard 9| to the new keyboard 92 may be made in a manner sim ilar to the described connections for said repeat key. If a control key is not held down, that is, if it is merely given a momentary depression, the connection from such control key of the Sundstrand keyboard to the corresponding key of the new keyboard, need not include a Iatchable key-stem 91.

Each of the keys of the new keyboard 92 includes the lateral branch I03 terminating in the vertically-extended portion I04. As shown in Figure 1, the new keyboard 92 slopesdownwardly from the rear, the lateral branches I03 of the key-stems, as a group, being similarly sloped. This sloping arrangement of the branches I03 together with the nested arrangement of said branches indicated in Figure 3 provides adequate clearance for the connections thus made between the two keyboards SI, 92. The ends of thebranches I03 are joined to their respective key-stems at the bends 93, Figure 3, which bring said key-stems into parallelism.

Figure 3 indicates generally the formation of.

the blanks from which the key-stems 96, 99, and

their extensions are made, it being understood As described in Patent No. 1,583,102, to o. J. Sundstrand, dated May 4, 1926, a digit-key when depressed swings a corresponding bell-crank III, to operate a pin-setting plunger I I2 through the 5 usual connections, as shown in Figure 3, which include a link. H3 connecting the bell-crank III to a v bell-crank H4 to which the pin-setting plunger H2 is connected. A spring H5 pulling on said bell-crank I I4 operates to restore the described key-train, including a key-stem 96 of the new keyboard 92, toits normal'position.

The pin-setting plungers H2 operate upon difierent denominational columns of type-bar stops 84 seriatim to set said stops through the usual mechanism described in said Sundstrand Patent No. 1,583,102, it being understood that the Sundstrand type-bars I3 will be elevated to diiferent extents determined by said stops to print the numbers of an item corresponding to the numbers indexed on the new keyboard 92. Said numbers are printed by the types 11, which are formed on the ends of plungers I I6. Said plungers H6 are retained in the usual casings at the upper ends of the Sundstrand type-bars I3, said casings, the construction of the plungers, and the manner of retaining the latter being shown in the Sundstrand Reissue Patent No. 14,237. Each plunger H6 is normally held back by a spring, not shown, so that its type 11 is spaced forwardly of the platen I9.

After an item has been set up by operation of the keys 95 of the new keyboard, the Sundstrand mechanism is cycled. In this cycling operation, the different type-bars I3 rise to positions corresponding to the item that has been set up, and

after reaching said positions, the regular Sundstrand printing hammers H1 are caused to be fired. Said hammers and their operating means are fully described in Patent No. 1,747,743, to

O. J. Sundstrand, dated February 18, 1930. The type-bars I3 having been elongated beyond the length of the usual Sundstrand type-bars to reach to the typewriter-platen I9, which, according to the new arrangement, is considerably above the position of the discarded Sundstrand platen, it is obvious that theesundstrand printing hammers H1 will not reach the type-plungers H6. It is contrived nevertheless to utilize said hammers H1 without extending the hammers themselves, as such extension would objectionably increase the inertia of the hammers and the stroke of the hammer-head.

There is provided accordingly a system of auxiliary hammers H8, which are in the form of levers having upwardly and downwardly extending arms, the upwardly-extending arm constituting the hammer H8, and a downwardly-extending arm I I 8 of each lever serving to move the hammer in the right direction when acted upon by an intermediate lever I20, said intermediate lever having a lower arm I2I, the lower end of which may be struck by the head of the Sundstrand hammer H1. An upper arm I22 of said lever I20 has a pin-and-slot connection I23, as

indicated in Figures 1 and 4, to the arm I I9 of the auxiliary hammer H8.

As already stated, the Sundstrand upper printbar mechanism is disposed within a channelportion 10 of the right-hand member I28 of the typewriter-framework, Figure 5 indicating in detail the formation of said channel-portion. Supporting means for the various parts of the upper print-bar mechanism include a plate I 43 spaced from the side wall I24 of said channel-portion 10.

For thus spacing said plate I43 and securing it,

there are provided principally three studs I25, I26 and I21, extending from the inner side of the right-hand member I28, Figure 5, of the typewriter-framework, said studs being threaded at one end into said side member I28. Said studs 5 are of a length to space the plate I43 as desired when the latter abuts the outer ends of said studs, said outer ends being threaded to receive screws I29 for securing said plate I43. In addition to the plate-supporting studs just mentioned, there 10 is a stud I30, upon which the intermediate levers I20 may be iulcrumed, and a stud I3I, upon which the auxiliary hammers H8 may be fulcrumed, said studs I30, I3I being threaded into the wall I24 of the typewriter side member I28 15 and extending outwardly therefrom to abut the plate I43, so as to be secured-by said plate through screws I32 passing through said plate and threaded into the outer ends of said latter studs I30, I3I. Similarly, another stud I 33, also threaded into 20 the wall I24, and having its outer end abutting and secured to the plate I43 by a screw I34, serves to guide the upper ends of the type-bars I3, said type-bars having vertically-elongated slots I35, which have a sliding fit over said stud 25 I33. The intermediate levers may be spaced at their lower ends by a slotted comb-plate I36 extending from and secured to the bottom edge of the right typewriter-frame member I28 by screws I31. Said comb-plate I36, besides spacing the 59 intermediate levers I20, also aligns the lower ends of the arms I2I of said levers with the Sundstrand printing hammers H1. Said intermediate levers I20 may be spaced at their fulcrum-rod I30, by collars or hubs I38. Similarly, the auxiliary hammers I I8 may be spaced at their fulcrum-rod I3I by collars or hubs I39. The upper ends of the auxiliary hammers H8, formed as bestshown in Figures 1, 2 and 4, may be spaced by a combplate I40, which also aligns said hammers with 40 the columns of type-plungers I I6. The left end of the comb-plate I40 may rest upon a tab I 4|, bent inwardly from the plate I43, and may be secured thereto by a screw I 44. The right end of said comb-plate may be formed as best indi- 45 cated in Figure 1 to form a downwardly-extending double leg I42.

Said leg I42 is bent at right angles from the comb-plate I40, and is further bent to form feet I 50, which may rest upon the top of the right 50 frame-member I28, as indicated in Figures 1, 4 and '1, and be secured thereto by screws I5 I. The plate I43 and the leg I42 are formed, as best shown in Figures 1 and '7, to support'a cross-rod I45 to which ends a series of hammer-springs I46 may be attached, the other ends of said springs being attached to the auxiliary hammers H8, as indicated in Figures 1, 4 and '1.- Said springs I46 pull the hammers H8 rearwardly until the arms I 2I of the intermediate levers I20, connected to said hammers H8, abut the bottoms of the slots in the comb-plate I36, thereby normally spacing the striking ends of the hammers H8 from the forward ends of the type-plungers H6. Said lower arms I2I of the intermediate lever I20 are positioned a considerable distance from the striking ends of the Sundstrand hammers H1, so that said latter hammers when released may have developed considerable inertia before striking the intermediate levers I20, it being understood that the Sundstrand hammers H1 are released by withdrawal of a latch I41, whereupon they swing about a fulcrum I48 under the pull of springs I49.

The upper ends of the Sundstrand print-bars in the rear edge of the comb-plate I40 which includes rearward extensions I52 embracing the sides of the type-casings at the ends of the group. The slots I53 clear the forward ends of the typeplungers H6.

The Sundstrand ribbon-vibrator slides 84 may have at their upper ends sliding connections I54 with the plate M3 and the leg I42.

Figure 2 best indicates the form of the upwardly-extended Sundstrand ribbon-vibrator slides 84, which, besides being guided at their upper ends by means of the sliding connections ifit, are also guided at their lower ends in sliding connections For symmetry of appearance the casing H extends to the left of the typewriter-frame as much as it extends to the right. In the excess room thus afiorded within said casing, there may be placed a cycling motor ifi'i for the Sundstrand mechanism, and connected in any suitablemanner to the Sundstrand cycling mechanism partly shown at its, Figure 1. Operation of said cycling mechanism M38, as effected by the motor i'rii, may be initiated by operation of the usual Sundstrand cycling key W9, Figure 7. By a suitable extension to clear the pa ts that extend from the Sundstrand mechanism to the Underwood typewriter. As indicated in Figure It, said opening may be considerably larger than is needed for such clear ance, the enlargement serving to minimize the weight of the casing i2. The top of the casing may have bosses i recessed to receive the feet 65 oi the typewriter. The typewriter may be secured upon said casing by suitable clamps ltd, which may have lugs 56? at their lower ends to overlap a recess in the edge of the opening and tightening screws M8, the upper ends of said clamps EGG being so formed that screws 6G6 bear upon the edges 259 of the typewriterframe side members.

A work-sheet ilil is positioned around the typewriter-platen in the usual manner. Operation of a column-tabulating key illipositions the carriage for beginning a line of typing, said key i'ii, when operated, calling into action the Underwood carriage-stopping mechanism 28. Where a line includes descriptive matter the typewriter-keys are now operated to write said matter. If said line is also to include a printed item which is to be accumulated in the Sundstrand mechanism, the new keyboard 92 is operated to set up said item after the typing operation by the typewriter-keys is finished. The finger-piece 513i (cycling key) is then pressed to cycle the Sundstrand mechanism, thereby printing the item through the types ill, and at the same time accumulating it in the Sundstrand mechanism. If the item printed by the types ii is a total, the keyboard 92 is of course not operated except to set the usual total-key, whereupon the cycling key Hit is Operated, and the types ii print according to the total that is accumulated in the Sundstrand register H2 conventionally shown in Figure l.

The printing of an item by the Sundstrand types Tl may follow upon the typing operations of the typewriter without a preparatory positioning of the typewriter-carriage, inasmuch as, hereinbefore explained, the space between the typewritten portion of the line and a portion printed by the adding types TI is comparatively small, and is in many cases not objectionable. Should it be desired to reduce the space, however, the carriage is positioned to the right after the typewritten portion of the line is completed, and its exact position may be determined by means of the auxiliary tabulating gage, hereinbefore described.

The Underwood line-space lever I86 is operated in the usual way to line-space the platen.

Should the ribbon-vibrating slides 84 be so arranged that the black portion of the ribbon normally covers the printing-field, the ribbon will slope downwardly somewhat from the lefthand slide toward the typewriter-ribbon-vibrator 88. when the red field of the ribbon is to be presented to the printing line.

It may be noted that it is also feasible to have the black field of the ribbon normally below the printing-line, the Sundstrand ribbonvibrating mechanism described in the hereinbeiore-mentioned Sundstrand Reissue Patent 14,23? being modified by raising the red controlling hook W5 so that the slides 84 are operated when the black ribbon field is med.

it will also be noted that the construction of the guides it, it depends on the extent to which the ribbon-portion in the Sundstrand printingfield is shifted. If the guide "i5 be spaced enough from the guide "it, provision for movement of the guide it only will suffice; in such case the portion of the guide immediately in contact with the ribbon may be in the form of a roll iiifl, Figure 9, slidable up and down axially upon the main portion of the guide Alternatively, an upper flange H3, Figure l, of the guide may be extended from the upper edge of the ribbon suificientiy to permit whatever upward displacement of the ribbon is arranged for. Similarly, the lower flange iii of the guide it may be spaced from the lower edge of the ribbon, so as not to interfere with said edge when the ribbon is in its lowest position. The slides 8% may be pro vided with suitable projections to engage the top and bottom edges of the ribbon. I

The regular Underwood carriage-irame 22 may be modified at its right-hand end portion to clear the tops of the Sundstrand print-bars l3 when the latter are in their uppermost positions. For

this reason said end portion may be arched, as

indicated at ii'ii, Figures 1 and 4. The front of the carriage-frame is guided in the front track 23 by rolls ill", which bear in said track, as indicated. The finger-lever 40, H for the auxiliary tabulating gage may be pivoted near the top of the arched portion I16 of the carriage, as indicated in Figures 1 and 4.

A spring We? pulling upon the arm 43 of the bail 3i keeps the dog 35 in normally retracted position, and yields when the finger-piece 38 is depressed to project said dog into effective position. The other end of said spring H8 may be anchored to a stud HQ projecting from the side of the platen-shift frame 2!, the up-and-down movement of said frame iii in case-shifting being of no consequence to the function of said spring l'i'd. Rearward displacement of the parts by the spring H8 may be limited by abutment of the stop 35 against the bottom of the slot in the buttressing bracket 50.

In this case the slides 84 are only operated Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a combined typewriting and adding machine, the combination of a system of. elongate reciprocatory adding printing bars, ribbon-feeding mechanism, and a framework for said machine including a pair of spaced side members supporting typewriting mechanism, one of said side members having a channel-portion within which the adding printing bars are arranged, the other side member having a similar channel-portion within which the ribbon-feeding mechanism is arranged.

2. The combination of an adding machine, a typewriting machine having a platen, said machines being of the character described, a casing for the adding machine and supporting the typewriting machine, a series of adding machine printing bars extending upwardly through said casing for printing against the typewriter-platen, a ribbon-spool mounted on a vertical shaft, and a bracket in which said shaft is journaled, said typewriting machine including a framework having right and left side wall members, one of said side walls having a channel-portion within which the adding printing bars are arranged, the other side wall member having a similar channel-portion within which the ribbon-spool shaft and bracket are arranged.

3. The combination of an adding machine, a typewriting machine having a platen, said machines being of the character described, the typewriting machine being disposed above and to one side of the adding machine, so that upwardly-extended printing bars of the adding machine may print against saidplaten, the typewriting machine having a side wall member forming part the strokes of the hammers, said striker-levers and said intermediate levers being mounted on fulcrum-rods supported between a side-member of the typewriter-unit frame and a plate spaced inwardly from saidside-member, said addingmachine-printing members rising in the space between said plate and typewriter-unit sidemember.

of its framework, said member having a channelportion, a plate, and means spacing said plate from said channel-portion to form ahousing within which the upper ends of said printing bars against said platen, a series of hammers andconnections for actuating said types to print, said side wall member including a channel-portion,

a plate, and means spacing said plate from said wall and forming a housing within which the upper ends of the printingbars are guided and retained and within which said hammers and connections are guided and retained.

5. A combined typewriting and computing ma-' chine including an adding-machine unit, a frontstrike typewriter-unitdisposed above the addingmachine unit, said adding-machine unit having normally cocked printing-hammers, addingprinting members controlled by said adding-machine unit and ranging above said hammers, in order to present their types to the typewriterplaten, said types-being therefore out of reach of said hammers, a set of levers having typestriking heads for coaction with the active types, said levers ranging-downwardly, and intermediate levers arranged to receive the blows of the released hammersand to transmit said blows to said striker-levers, whereby the strokes of the heads of the latter are in the same direction as 6. A combined typewriting adding and listing machine -having a platen-carriage common to typewriter-types and denominational printingmembers, said carriage moving in letter-feed direction at the operation of said types, and being movable in opposite direction for bringing the typed matter into certain proximity to an amount printed by said denominational members, a stationary rack extending in the direction of carriage travel, a stop settable along said rack, and

Gil

Ill

a bail pivoted to said carriage, so that one end bf said bail is disposed for connection, to a fingerpiece provided upon one end of the carriage, said bail extending inwardly from said carriage-end, lengthwise of the carriage, and thereby presenting, at a point disposed inwardly from said carriage-end, a counter-stop, formed on said bail,

for engaging the stop on said rack, whereby the extent of the rack is minimized, said bail being rockable by said finger-piece to project said counter-stop from a normally retracted position into position for co-operation with the stop on said the typewriter-platen being common to said typewriter-types and denominational printing members, the typewriter including a traveling platen-carriage, and a trackway for said platencarriage disposed forwardly of said platen, said printing-members playing between said platen and trackway, and extending substantially above the latter in their uppermost positions, said platen-carriage including a frame having end members reaching forwardly of the platen, so that said frame may engage said trackway, one of said carriage-frame end-members being formed with an inverted U-shaped arch-under which said printingmembers may stand in their uppermost :positions without interfering with said carriage-end-member, said arch including a front leg extending downwardly in front of the printing-members toward said trackway, whereby collision of said carriage-end member and said denominational printing-members is avoided.

8. A combined typewriting, adding and listing machine including a front-strike typewriterunit with its frame, platen and letter-feeding carriage; a key-set, cycling adding-unit connected to co-operate with said typewriterplaten; the typewriter-unit including a system of key-controlled type-bars striking at a common point at the front of the platen; said addingunit forming a base which is surmounted by said typewriter-unit; a nested denominational system tending downfrom the platen alongside of the 7 system of typewriter-type-bars and through the bottom of the front-strike typewriter-unit and into the adding-unit-base, said digit-type-carryingrods being connected at their lower ends to the adding-unit in the base, to co-operate therewith for printing on a work-sheet," in the same printing-line with the typewriter-types, the amount which is computed by the adding-unit.

9. A combined typewriting and computing machine including a front-strike typewriter-mechanism having a platen and letter-feeding carriage therefor, an adding mechanism, said typewriter and adding mechanisms being combined so that the typewriter-platen is common thereto, said adding mechanism having denominational printing-members standing in front of the platen and which carry digit-types for printing in a field on the platen disposed to one side of the typewriter-printing point, a ribbon-vibrator for the typewriter-mechanism, two ribbon-spool spindles disposed on the other side of the typewriter-printing point, the ribbon extending from one spindle to said ribbon-vibrator, and ribbon-guiding means for directing the ribbon from said vibrator to pass between the platen and the adding-printing-rnember-digit-types to serve the latter, and for then forming a loop to pass the ribbon around the front of said printing-members for returning the ribbon to the other ribbon-spool spindle, whereby the leg of said loop which returns the ribbon to said other spool clears the other leg of said loop and the typewriter-ribbonvibrator eoacting therewith, to prevent fouling, and whereby said ribbon-returning leg does not obstruct visibility of the printing-line, said adding-mechanism printingmembers playing within said loop.

10. A combined typewriting and computing machine including a front-strike typewritermechanism having a traveling platen and keyoperated types movable to a common printingpoint, an adding-listing mechanism having front-strike printing-members upstanding in front of said platen and carrying digit-types which print in a field on said typewriter-platen disposed to one side of the typewriter-printing point, a ribbon-vibrator for the typewritermechanism, two ribbon-spool spindles disposed on the other side of the typewriter-printing point, the ribbon extending from one spindle to said ribbon-vibrator, and means for directing the ribbon from said vibrator to pass between the platen and the adding-digit-types to serve the latter, and for then forming a loop around the digit-types for returning the ribbon to the other spindle, said ribbon-directing means including provision whereby one leg of said loop includes the portion extending from the ribbon-vibrator past said adding-digit-types, and the other leg of said loop which returns the ribbon to said other spindle is disposed sufiiciently forward of the platen to pass in front of said adding-printing members and the path of the typewriter-types.

11. A combined typcwriting and computing' machine including a iront-strike typewritermechanism having a traveling platen and keyoperated types movable to a common printingpoint, an adding-listing mechanism having front-strike printing-members standing in front of said platen and carrying digit-types which print in a field on said platen disposed to one side of the typewriter-printing point, a ribbonvibrator for the typewriter-mechanism, a ribbonvibrator for the adding-printing field, two ribbon-spool spindles disposed on the other side of the typewriter-printing point, the ribbon extending from one spindle to the typewriter-ribbon vibrator, and thence to the vibrator for the adding-printing field, a guide disposed to turn the ribbon forwardly from the platen after it has passed the adding-printing field, and a second guide spaced forwardly from said first guide to turn the forwardly-turned ribbon back toward the other ribbon-spindle, said guides forming a loop in the ribbon, one leg of the loop including the ribbon-portion passing the typewriter-printing point and adding-printing field, the other leg of the loop being spaced forwardly from said portion by means of said second guide, so that said other leg passes in front of said addingprinting members and the typewriter-types.

12. A combined typewriting and computing machine including a front-strike typewritermechanism having a traveling platen and keyoperable types movable to a common printingpoint, an adding-listing mechanism having front-strike printing-members standing in front of said platen and carrying digit-types which print in a field on the platen disposed to one side of the typewriter-printing point, a ribbon-vibrator for the typewriter-mechanism, and a ribbonvibrator for the adding-printing field, two ribbon-spool spindles disposed on the other side of the typewriter-printing point, the ribbon extending from one spindle to the typewriter-ribbon vibrator, and thence to the vibrator for the adding-printing field, a guide disposed to turn the ribbon forwardly from the platen after it has passed the adding-printing field, and a second guide spaced forwardly from said first guide to turn the forwardly-turned ribbon back toward the other ribbon-spindle, said guides forming a loop in the ribbon, one leg of the loop including the ribbon-portion passing the typewriter-printing point and adding-printing field, the other leg of the loop being spaced forwardly from said portion by means of said second guide, so that said other leg passes in front of said adding-printing members and the typewriter-types, said first guide being mounted in proximity to said add ing-printing-field vibrator, and being movable in correspondence with the vibration of the vibrator at the adding-printing field.

13. A combined typewriting, adding and listing machine, including a front-strike typewriterunit with its frame, platen and letter-feeding carriage; a key-set, cycling adding-unit forming a base which is surmounted by said typewriter-unit; denominational type-rods, each carrying a set of digit-types, for the adding mechanism, said rods extending down from the typewriter-platen alongside of the system of typewriter-type bars and through the bottom of the front-strike typewriter-unit and into the addingunit-base, said digit-types being confined within the typewriter-frame in proximity to the typewriter-printing point, said digit-type-carrying rods being connected to the adding-unit for printing on a work-sheet in the same printingline with the typewriter-types the amount which is computed by the adding-unit, said typewriterunit having the usual keyboard, said keyboard also surmounting said adding-unit-base; and a complement of adding-unit indexing and control keys operatively connected to said adding-unit and incorporated in said adding-unit base so as to form an adding-unit keyboard at the top of the adding-unit base and in front of said typewriter-keyboard.

14. A combined typewriting, adding and listing machine, including a front-strike typewriterunit with its frame, platen and letter-feeding carriage; a key-set, cycling adding-unit forming a base which is surmounted by said typewriterunit; denominational type-rods, each carrying a set of digit-types, for the adding mechanism, said rods extending down from the typewriterplaten alongside of the system of typewritertype bars and through the bottom of the frontstrike typewriter-unit and into the adding-unitbase, said digit-types being confined within the typewriter-frame in proximity to the typewriterprinting point, said digit-type-carrying rods being connected to the adding-unit for. printing on a work-sheet in the same printing-line with the typewriter-types the amount which is computed by the adding-unit, said typewriter-unit having the usual keyboard, said keyboard also surmounting said adding-unit-base; and a complement of adding-unit indexing and control keys operatively connected to said addingunit and incorporated in said adding-unit base so as to form an adding-unit keyboard at the top of the adding-unit-base and in front of said typewriter-keyboard, said adding-unit-base including selectively operable indexing and control trains, disposed substantially in the same lateral Zone as said digit-type-carrying rods and extending forwardly from the latter to front, indexable termini, said adding-keyboard being offset laterally from said zone and forwardly from said indexable termini for location in front of the typewriter-keyboard, means being provided to operatively connect said indexable termini of the indexing and control trains to the corresponding keys of the adding-unit keyboard.

15. A combined typewriting, adding and listing machine, including a front-strike typewriterunit; a key-set, cycling adding-unit; the typewriter-unit including a main frame, a revoluble platen and letter-feeding carriage therefor at the top of the typewriter-unit; a system of singlyoperable type-bars printing at a common printing-point at the front of the platen, and working in planes radiating to the left and right of said common printing-point; means supporting said typewriter-unit bodily above the adding-unit; and a group of denominational printing-members,

including denominational orders of digit-types,

cycled under control of the adding-unit and extending upwardly therefrom through the bottom of the typewriter-unitfor printing amounts, entered in said adding-unit, upon a work-sheet on the typewriter-platen in a field aside from and aligned with said typewriter-printing point; said typewriter-unit having provision designed to afford room for the group of denominational printing-members for the adding-unit to pass upwardly between oneof the typewriter-frame side-members and said system of typewriter-type bars for reaching said typewriter-platen, and said typewriter-unit being located upon said supporting means to register said room with said laterally outside of the typewriter-type-bar system at said other side of the typewriter-printing point, a ribbon-vibrator for the typewriter-printing point, th ribbon extending between one spindle and said ribbon-vibrator, and from the latter along the platen past the adding-digit types, and ribbon-guiding means disposed laterally of and outside of the nest of digit-types, and about which the ribbon is reflexed into a return path which is in front of the adding-digit types and by way of which said ribbon extends toward or from the other spindle, the digit-types operating within the loop formed by the reflexed ribbon.

17. Machine constructed according to claim 8, part of the typewriter-type-bar system, together with said digit-type-carrying rods, being disposed on one side of the typewriter-printing point, the remainder of said typewriter-tyfpe-bar system being disposed on the other side of said typewriter-printing point.

18.- A machine constructed according to claim 8, said typewriter-unit including a system of type-key levers disposed below and occupying room laterally beyond the typewriter-type-bar system at the region of the downwardly-extending digit-type-rods, some of the type-key levers at the side of the system being therefore interspaced with said digit-type-carrying rods.

19. A machine constructed according to claim,

8, the adding-unit including spring-operated normally-latched hammers operable, for printing, under control of a cycling mechanism of said adding-unit, said hammers being mounted in the adding-base, and hammer-blow-transmitting trains extending up from said hammers to position to thrust the selected digit-types back against the work-sheet on said platen.

20. A machine constructed according to claim 8, the adding-unit including spring-operated normally-latched hammers operable, for printing, under control of a cycling mechanism of said adding-unit, said hammers being mounted in the adding-base, trains extending up from said hammers to position to thrust the selected digit-types back against the work-sheet on said platen, each hammertrain including two levers of the first order disposed upstandingly end to end, the downwardlyextending arm of the bottom lever being struck by the corresponding hammer in the adding-base, and the upstanding arm of the upper lever having a head operative to thrust the selected digittypes back. against said work-sheet.

21. A machine constructed according to. claim 8, said digit-types being in the form of plungers mounted by said denominational rods for rearward thrusts to print against the platen, means being provided to return each type-plunger forwardly after the printing-impact, said addingunit including spring-operated normally-latched printing-hammers operable under control of a cycling mechanism of said adding-unit, said hammers being mounted in the adding-base, and hammer-blow-transmitting devices extending up from said hammers to position opposite the printingline to thrust the selected digit-type-plungers back against the work-sheet on said platen.

22. Machine constructed according to claim 8, the typewriter-unit including a ribbon-mechanism for a printing ribbon common to the typewriter-types and adding-digit-types, said ribbonmechanism having two ribbon-spool spindles, both disposed on one side of the typewriterprinting point, the adding-digit-types being disand. hammer-blow-transmitting posed on the other side of said typewriter-printing point, and ribbon-circuiting means having provision for directing the ribbon from one spindie to a ribbon-vibrator provided for and at the typewriter-printing point, and thence along the platen to pass between the platen and said digittypes, said provision including devices about which the ribbon, after it is past said digit-types, is refiexed forwardly of the platen to circuit the ribbon back to the other spindle along a path in front of the zone of operation of-the digit-types, the latter operating within the ribbon-loop formed by said ribbon-circuiting means.

23. Machine constructed according to claim 8, the typewriter-unit including a ribbon-mechanism for a printing ribbon common to the typewriter-types and adding-digit-types, said ribbonmechanism including a ribbon-vibrator for the typewriter-printing point, a ribbon-vibrator for the adding-type-printing field, two ribbonspool spindles, both disposed on one side of the typewriter-printing point, the digit-types for the adding-unit being disposed on the other side of said typewriter-printing point, and ribbon-circuiting means having provision for directing the ribbon from one spindle to the typewriter-printing-point ribbon-vibrator, and thence along the platen to pass between the platen and said digittypes by way of the adding-printing-field ribbonvibrator, said ribbon-circuiting means also having devices for reflexing the ribbon, after it is past said digit-types, forwardly of the platen to circuit the ribbon back to the other spindle along a path in front of the digit-types, the ribbonrefiexing devices being disposed in proximity to the adding-field ribbon-vibrator, and including provision for accommodating the up-and-down movement of the ribbon at the ribbon-reflexing devices at operation of said adding-field ribbonvibrator.

24. Machine constructed according to claim 8, the typewriter-unit including a ribbon-mechanism for a printing ribbon common to the typewriter-types and adding-digit-types, said ribbonmechanism including two upright ribbon-spool spindles, both on one side of the typewriterprinting point, the adding-digit types being disposed on the other side of said typewriter-printing point, the upper ribbon-bearing ends of said spindles being disposed substantially horizontally forward of said platen, and ribbun-circuiting means having provision for directing the ribbon from one spindle to a ribbon-vibrator provided for and at the typewriter-printing point, and thence along the platen to pass between the platen and said digit-types, said provision including devices about which the ribbon, after it is past said digit-types, is reflexed forwardly of the platen to circuit the ribbon back to the other spindle along a path in front of the zone operation of the digit-types, the latter operating within the ribbon-loop formed by said ribboncircuiting means. a

25. Machine constructed according to claim 8, the typewriter-unit including a ribbon-mechanism for a printing ribbon common,to the typewriter-types and adding-digit types, said ribbonmechanism including two upright ribbon-spool spindles, both on one side of the typewriter-printing point, the adding-digit-types being disposed on the other side of said typewriter-printing point, the upper ribbon-bearing ends of said spindles being disposed substantially horizontally forward of said platen, a ribbon-vibrator for the typewriter-printing point, the ribbon extending between one spindle and said ribbon-vibrator, and from the latter along the platen past the addingdigit-types, and ribbon-guiding means disposed laterally of and outside of the nest of digit-types, and about which the ribbon is reiiexed into a return path which is in front of the adding-digittypes and by way of which said ribbon extends toward or from the other spindle, the digit-types operating within the loop formed by the reflexed ribbon.

ALFRED G. F. KUROWSKI. 

